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CVE-2026-91943— Crawl4AI before 0.9.3 SSRF via PDFContentScrapingStrategy

Quick assessment

Affected
unclecode crawl4ai
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

UncleCode Crawl4AI是新加坡UncleCode个人开发者的一款AI驱动的爬虫软件。 UncleCode Crawl4AI 0.9.3之前版本存在服务端请求伪造漏洞，该漏洞源于PDFContentScrapingStrategy中_get_pdf_path()未进行出口验证即重新下载目标，容易受到服务端请求伪造攻击，可能导致经过身份验证的攻击者提供重定向到内部地址的URL或利用DNS重绑定访问内部服务，并通过PDF文本提取泄露响应内容。

CVSS 7.7 · High EPSS 0.35% · P29

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 2

VendorProduct Version RangeStatus
unclecode crawl4ai < 0.9.3 affected
0.9.3 unaffected
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I. Basic Information for CVE-2026-91943

Vulnerability Information
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Vulnerability Title
Crawl4AI before 0.9.3 SSRF via PDFContentScrapingStrategy
Source: CVE Program / CVE List V5
Vulnerability Description
Crawl4AI before 0.9.3 contains a server-side request forgery vulnerability in PDFContentScrapingStrategy where _get_pdf_path() re-downloads targets with Python requests without egress validation. Authenticated attackers can supply URLs that redirect to internal addresses or use DNS rebinding to access internal services, exfiltrating responses through PDF text extraction in crawl results.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
UncleCode Crawl4AI 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
UncleCode Crawl4AI是新加坡UncleCode个人开发者的一款AI驱动的爬虫软件。 UncleCode Crawl4AI 0.9.3之前版本存在服务端请求伪造漏洞，该漏洞源于PDFContentScrapingStrategy中_get_pdf_path()未进行出口验证即重新下载目标，容易受到服务端请求伪造攻击，可能导致经过身份验证的攻击者提供重定向到内部地址的URL或利用DNS重绑定访问内部服务，并通过PDF文本提取泄露响应内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
unclecode crawl4ai 0 ~ 0.9.3 -

II. Public POCs for CVE-2026-91943

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III. Intelligence Information for CVE-2026-91943

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Vendor Advisories for CVE-2026-91943 (2)

Same Patch Batch · unclecode · 2026-09-15 · 5 CVEs total

CVE-2026-91941 7.5 HIGH Crawl4AI before 0.9.3 Denial of Service via PDFContentScrapingStrategy
CVE-2026-91940 7.5 HIGH crawl4ai before 0.9.3 Arbitrary File Write via PDFContentScrapingStrategy
CVE-2026-91944 6.1 MEDIUM crawl4ai before 0.9.3 DOM-based XSS via Playground UI
CVE-2026-91942 5.4 MEDIUM crawl4ai before 0.9.3 Cross-Site Scripting via innerHTML

IV. Related Vulnerabilities

Same product: crawl4ai
Same vendor: unclecode
Same weakness: CWE-918